James 5:16

14 Is any sick among you? let him call for the elders of the church; and let them pray over him, anointing him with oil in the name of the Lord:

15 And the prayer of faith shall save the sick, and the Lord shall raise him up; and if he have committed sins, they shall be forgiven him.

Confess your faults one to another, and pray one for another, that ye may be healed. The effectual fervent prayer of a righteous man availeth much.

17 Elias was a man subject to like passions as we are, and he prayed earnestly that it might not rain: and it rained not on the earth by the space of three years and six months.

18 And he prayed again, and the heaven gave rain, and the earth brought forth her fruit.

Do read the surrounding verses too, because the context often says more than a single verse.

Compare

BSB
Therefore confess your sins to each other and pray for each other so that you may be healed. The prayer of a righteous man has great power to prevail.
KJV
Confess your faults one to another, and pray one for another, that ye may be healed. The effectual fervent prayer of a righteous man availeth much.
WEB
Confess your sins to one another and pray for one another, that you may be healed. The insistent prayer of a righteous person is powerfully effective.
ASV
Confess therefore your sins one to another, and pray one for another, that ye may be healed. The supplication of a righteous man availeth much in its working.
DARBY
Confess therefore your offences to one another, and pray for one another, that ye may be healed. [The] fervent supplication of the righteous [man] has much power.
BLB
Therefore confess the sins to one another and pray for one another, so that you⁺ may be healed. The supplication of a righteous [man] being made effective prevails much.
ÅB
Bekjenn derfor deres synder for hverandre og be for hverandre, for at dere kan bli legt! En rettferdig manns bønn har stor kraft i sin virkning.
OTB
Bekjenn derfor deres synder for hverandre og be for hverandre, så dere kan bli helbredet. En rettferdig persons bønn er kraftig og virksom.
B1930
Bekjenn derfor eders synder for hverandre og bed for hverandre, forat I kan bli lægt! En rettferdig manns bønn har stor kraft i sin virkning.

Study notes (Tyndale)

Original text and word study

Cross references